matt welch, dana milbank. thanks to all of you. >>> unfortunately there has been another suicide attack. it hit u.s. forces in afghanistan this morning. killing at least 14 people including three u.s. soldiers. military officials say four afghan police officers were also killed. i'll be talking to nbc's richard engel live in afghanistan. that's ahead. [ male announcer ] your mouth is cleanest after a dentist visit. ♪ but between check-ups, it goes through a lot. ♪ tartar builds and that feeling fades. with new listerine® ultraclean™, you can keep it dentist clean. it's the only mouthwash with proven tartar control and new everfresh™ technology for a powerful dentist clean feeling up to 3x longer. ahhhhhhhh. [ male announcer ] keep your mouth dentist clean with new listerine® ultraclean™. power to your mouth™. with new listerine® ultraclean™. extra curricular activities help provide a sense of identity and a path to success. joining the soccer team. getting help with math. going to prom. i want